Sources said Miller — who sold Quattro Wireless, the mobile advertising company he co-founded in 2006, to Apple in early 2010 for $275 million — will become a general partner at Highland Capital, the Boston-based venture firm that had funded Quattro.

Apple will search for a replacement for Miller, whose staff was told of the impending departure today.

There’s no word on why Miller is leaving, but it certainly can’t help that iAd is, so far, one of Apple’s relative duds, with advertisers turned off by both the high costs of advertising on the platform, the fact that the ads only run on iOS and Apple’s usual tight-fisted control over the whole creative process. Given iAd’s slow start, it wouldn’t surprise us if Miller was feeling the heat.

About the author:

John Brownlee is a Contributing Editor. He has also written for Wired, Playboy, Boing Boing, Popular Mechanics, VentureBeat, and Gizmodo. He lives in Boston with his wife and two parakeets. You can follow him here on Twitter.

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Guest

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